Alienware X51 R3 vs. HP EliteDesk 800 G6 SFF

Comparison and Differences

Alienware_X51_R3.jpg case front and back pannelHP_EliteDesk_800_G6_SFF.jpg case front and back pannel
Model
Form factorSmall GamingSmall
CPU optionsIntel Gen6 i3/i5/i7;Intel Gen10 i3/i5/i7/i9; Celeron; Pentium;
ChipsetZ170Q470
Dedicated GPU *GeForce GTX 1650 SuperGeForce GTX 1650 Low Profile
RAMDIMM DDR3-2133DIMM DDR4-2933
RAM slots24
RAM speed2133 MT/s2933 MT/s
RAM max32 GB128 GB
USB ports(4x) USB 3.0 Type A; (2x) USB-A 2.0; (2x) USB 3.1 Type AUSB-C 3.1; (4x)USB-A 3.1; (4x)USB-A 3.0; (2x)USB-A 2.0;
Video portsHDMI 1.4b;(2x) DisplayPort;
Other portsRJ45; Headset; Line-Out; Line-In; S/PDFI optical/analog;RJ45; Hdph; Headset; Line-Out;
Optional portsN.A.DP1.4/ HDMI2.0a/ VGA/ USB-C(DP1.4)/ (2x)USB-A 3.0/ LAN/ Thunderbolt3; Serial; SD card reader;
SATA ports33
PCI slotsPCIe 3.0 x16;PCIe 3.0 x16; (2x) PCIe 3.0 x1; PCIe 3.0 x16 (wired x4);
M.2 slotsN.A.(2x) M.2 2280/2230 M-key (PCIe x4); M.2 2230 (WiFi/BT);
Drive bays(2x) 2.5in; 3.25in; 5.25in;2.5in; (2x) 3.5in; 5.25in (slim);
PSU180/240/330 W260/350 W
Weight5.49 kg (12.10 lbs6.13 kg (13.51 lb)
Released20152020
Manuallinklink
Price**Check PriceCheck Price

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* Dedicated GPU warning: Check if your particular power supply model has enough power. Additionally some PSUs don't come with an auxiliary PCIe power connector and you may need to buy a SATA to PCIe power adapter.

Differences between Alienware X51 R3 and HP EliteDesk 800 G6 SFF

If you are looking for a more modern desktop, then you should go with the HP EliteDesk 800 G6 SFF which was released in 2020. The Alienware X51 R3 is older and entered production in 2015.

Both models have the same form factor, meaning reoughtly they have the same phiysical size and form.

Processor

Usually the newer the generation of the CPU, the better the performance and efficiency is. If your budget allows it, you should go with the HP EliteDesk 800 G6 SFF as it is running a newer generation CPU. This is not to say that Alienware X51 R3 is bad - it can still run some powerful CPUs, albeit being an older generation.

Memory

The HP EliteDesk 800 G6 SFF has 4 RAM slots while the Alienware X51 R3 has only 2 slot(s). This is not something to worry about. Just make sure you take it into consideration when planning how much RAM you are going to use.

The HP EliteDesk 800 G6 SFF is using the faster 2933 MT/s RAM. The Alienware X51 R3 is slower by supporting RAM speeds of up to 2133 MT/s. Additionally, if you will be needing a lot of RAM, better go for the HP EliteDesk 800 G6 SFF as it has the ability to run 128 GB of RAM. The Alienware X51 R3 can do a bit less at max 32 GB. Most of the times, this should be sufficient for the majority of users.

Ports

In total the HP EliteDesk 800 G6 SFF has 11 USB ports. The Alienware X51 R3 is inferior in this regard and packs 8 USB ports. In any case, if you miss USB ports, you can always purchase a USB hub. It's great that both of the models have USB 3.1 ports which will allow you to exchange data with your peripherals at up to 10Gb/s. But if you need maximum connectivity, go with the HP EliteDesk 800 G6 SFF as it has 5 USB3.1 ports (the Alienware X51 R3 has 2).

DisplayPort is crucial for any desktop machine. It is good to see that both models are featuring DisplayPorts. However, the HP EliteDesk 800 G6 SFF comes with 2 ports, while the Alienware X51 R3 has only 1. If you are planning to use multiple monitors, the HP EliteDesk 800 G6 SFF is the better choice.

None of the models has an HDMI port. If your monitor supports only the HDMI interface, you will need to buy an adapter. Such adapters are cheap so nothing to worry about.

SATA slots are located on the motherboard and it is where SSD, HDD and Optical Disk Drives are connected. Each of the two models being compared have 3 SATA slot(s). Keep in mind that having too few SATA slots might limit your options for connecting additional memory drives.

If you want the fastest transfer speeds for your SSD, an M.2 interface is crucial. Thus, if the M.2 SSD slot is a mandatory requirement for you, go with the HP EliteDesk 800 G6 SFF. Sadly, the Alienware X51 R3 has no such slot, and you will be forced to use the SATA interface instead.

Make sure that the available M.2 slot supports the PCIe (also called NVMe) interface. This is important as there are M.2 slots which support only the inferior SATA III interface. For comparison, the SATA III interface has max speeds of 6Gb/s, while the PCIe 3.0 x4 will support speeds up to 32Gb/s!

Power Supply

Having a Power Supply Unit with high power rating is important, if you are going to use components which require extra power. The Alienware X51 R3 comes with a decent 330 Watt PSU, but the HP EliteDesk 800 G6 SFF has a more powerful one rated at 350 Watts. Choosing either one depends on your specific requirements and use case. Also don't forget that some models might have more than one PSU option - try to always get the most powerful one, especially if you plan to upgrade to a powerful GPU.

Motherboard

Alienware_X51_R3_motherboard.jpg motherboard layoutHP_EliteDesk_800_G6_SFF_motherboard.jpg motherboard layout